CSS Border-Radius Can Do That? | Web Designer Depot
Re: Idea : replacement for border-radius, a more complete corner styling property. from Andrew Fedoniouk on 2011-09-01 (www-style@w3.org from September 2011)
CSS Shapes Explained: How to Draw a Circle, Triangle, and More Using Pure CSS
Awesome CSS Border Animation Examples to Use in Your Websites
css - How can I show only corner borders? - Stack Overflow